Thanks Allycat,
Yes I do realise one is speed of sound and other is pressure differential , ( Bernoulli, Pitot, etc.) and therefore not ultrasonic.
It seems both can be "home made" though the sensirion appears to rely on a rather complex piece of 3D printing to direct the airflow over the sensors. I assume the pair of sensors in the arrangement that sense the highest airflow will decide wind direction.
Also it seems as if the arduino ultrasonic system in the soldernerd link seems to have stalled as a project so perhaps it was difficult to produce a reliably precise measurement.
Just some thoughts for future add ons to Weatherduino (once the AQI project is complete!!)
Yes I do realise one is speed of sound and other is pressure differential , ( Bernoulli, Pitot, etc.) and therefore not ultrasonic.
It seems both can be "home made" though the sensirion appears to rely on a rather complex piece of 3D printing to direct the airflow over the sensors. I assume the pair of sensors in the arrangement that sense the highest airflow will decide wind direction.
Also it seems as if the arduino ultrasonic system in the soldernerd link seems to have stalled as a project so perhaps it was difficult to produce a reliably precise measurement.
Just some thoughts for future add ons to Weatherduino (once the AQI project is complete!!)